Global Patent Index - EP 2290893 A1

EP 2290893 A1 20110302 - Frequency Synchronization in OFDM Receiver using sliding Fourier Transform

Title (en)

Frequency Synchronization in OFDM Receiver using sliding Fourier Transform

Title (de)

Frequenzsynchronisierung in einem OFDM Empfänger durch sliding Fourier Transform

Title (fr)

Synchronisation de fréquence dans un recepteur OFDM par utilisation d'une transformée de Fourrier glissante

Publication

EP 2290893 A1 20110302 (EN)

Application

EP 10154937 A 20100226

Priority

  • EP 09168483 A 20090824
  • EP 10154937 A 20100226

Abstract (en)

A received OFDM signal is demodulated by sampling the OFDM signal at successive time instants and computing a Fourier transform of the samples for a block of time instants. In addition, a sliding Fourier transform is computed at every new one of the same input samples, to extract a pilot frequency tone. From results of the sliding Fourier transform a frequency error signal is detected. This signal is fed back the in a frequency synchronization feedback loop. The frequency synchronization feedback loop may be used to track the pilot tone by adjusting a phase correction signal and/or to track sample clock frequency variations.

IPC 8 full level

H04L 27/26 (2006.01)

CPC (source: EP US)

H04L 27/266 (2013.01 - EP US); H04L 27/2675 (2013.01 - EP US); H04L 27/2684 (2013.01 - EP US)

Citation (applicant)

  • M. SPETH ET AL.: "Optimum Receiver Design for Wireless BroadBand Systems Using OFDM - Part I/II", IEEE TRANS. COM., vol. COM-47, no. 11, 1999, pages 1668 - 1677
  • IEEE TRANS. COM., vol. COM-49, no. 4, 2001, pages 571 - 578
  • V. FISHER ET AL.: "Frequency Synchronization Strategy for a PC-based DRM Receiver", 7TH INTERNATIONAL OFDM- WORKSHOP (INOWO'02), 2002
  • U. MENGALI ET AL.: "Synchronization Techniques for Digital Receivers", 1997, PLENUM PRESS, pages: 391 - 395
  • L. ERUP ET AL.: "Interpolation in Digital Modems-Part II: Implementation and Performance", IEEE TRANSACTION ON COMMUNICATIONS, vol. COM-41, no. 6, 1993, pages 998 - 1008

Citation (search report)

  • [I] WO 9216063 A1 19920917 - PHILIPS NV [NL]
  • [I] US 5692016 A 19971125 - VANSELOW FRANK [DE]
  • [A] WO 0147204 A1 20010628 - THOMSON LICENSING SA [FR], et al
  • [A] GB 2261560 A 19930519 - KOKUSAI DENSHIN DENWA CO LTD [JP]
  • [A] WO 03022004 A2 20030313 - INTEL CORP [US]
  • [A] US 5077531 A 19911231 - TAKEUCHI YOSHIO [JP], et al
  • [A] JACOBSEN E ET AL: "The sliding DFT", IEEE SIGNAL PROCESSING MAGAZINE, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 20, no. 2, 1 March 2003 (2003-03-01), pages 74 - 80, XP011095794, ISSN: 1053-5888
  • [A] SPRINGER T: "SLIDING FFT COMPUTES FREQUENCY SPECTRA IN REAL TIME", EDN ELECTRICAL DESIGN NEWS, REED BUSINESS INFORMATION, HIGHLANDS RANCH, CO, US, vol. 33, no. 20, 29 September 1988 (1988-09-29), pages 161 - 166,168,1, XP000111000, ISSN: 0012-7515

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

Designated extension state (EPC)

AL BA RS

DOCDB simple family (publication)

EP 2290893 A1 20110302; CN 101997813 A 20110330; US 2011044408 A1 20110224; US 8594211 B2 20131126

DOCDB simple family (application)

EP 10154937 A 20100226; CN 201010261018 A 20100823; US 86258710 A 20100824